Kristin Cavallari Flashes Undies, Gets in Screaming Match With Girl

A tipsy Kristin Cavallari, 23, got into an early morning screaming match with a gorgeous brunette who was flirting with her ex Brody Jenner, 26, at the Nylon Young Hollywood party at the Roosevelt Hotel in Hollywood Wednesday night. Cavallari had been fuming since 10:20 p.m., when she spotted Jenner hitting on Hills co-star Audrina Patridge, 25, who didn't seem interested as she's dating